Ethernet/IP 学习笔记四

Ethernet/IP 学习笔记四

EtherNet/IP Quick Start for Vendors Handbook (PUB213R0)：
https://www.odva.org/Portals/0/Library/Publications_Numbered/PUB00213R0_EtherNetIP_Developers_Guide.pdf

1. The “IP” in “EtherNet/IP” refers to “Industrial Protocol”.

2. Simplified EtherNet/IP Object Model

   Within the CIP application layer, devices are represented using an object model (Figure 4). Application objects define how device data is represented and accessed in a common way. Network-specific objects define how parameters such as IP addresses are configured and EtherNet/IP specific functions.

   Communication objects and services provide the means to establish communication associations and access device data and services over the network.

   

3. CIP does not specify how object data is implemented, rather, which data values or attributes must be supported and made available to other CIP devices.

4. There are three types of objects defined by CIP

Required Objects must be included in all CIP devices. These objects include the Identity Object, the Message Router Object and network-specific objects.

Application Objects describe how data is encapsulated by a device. These objects are specific to the Device Type and function. For example, an input device would have an input object with attributes that describe the value and fault status of a particular input point.

Vendor-specific Objects describe services that are specific to a particular vendor; they are optional and not described in a predefined Device Profile.